Toque

Everyone:

I am planning to put on a FAST manifold with a LS2 TB on my C5 Z06. I figured the C6 section was the best place to ask this question.

The coupler I am referring to is the RED one in my picture below. It connects to my stock C5 Z06 78mm Throttle Body.

I measured the inner diameter of the Red coupler in the below picture and its 10cm's (4 inches).

Do I need a bigger coupler to connect to a LS2 Throttle Body ?

Thanks !
Toque